Hey guys I'm on vaca in Maine.... I switched to the 4.0 carrier to do mms and stuff ... Works on day then will not. Noe I h e all five bars and only edge.... No three g at all and my maps is all messed with the compass... Wondering if the is any way revert back to 5.0 from my phone? I have no computer with me? Anyone else have the problems with 4.0 carrier file! Help please.. I need maps and service because I'm on vaca!!!